漿噴樁技術交底.doc
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交底內(nèi)容：
1. 本處理地段攪拌樁樁徑Ф500mm（攪拌鉆頭不小于Ф500mm）。采用42.5級普通硅酸鹽水泥。每加固1m土體摻入水泥量為55kg，單位樁長水泥用量的負值偏差應控制在8%以內(nèi)，單樁水泥用量負值偏差應控制在5%以內(nèi)。
2. 采用兩噴四攪法施工，自上而下攪拌，自下而上噴漿攪拌，水灰比為0.5。攪拌頭上提噴漿時的提升速度為0.5~1m/min。漿噴樁應穿過軟土層,并進入砂層或粘土層0.5米以上,當軟土層超過18米,樁長按18米控制。
3. 測放樁位按設計要求進行，在確定孔位時，需經(jīng)復核確認后方可進入下一施工工序，為保證樁位的準確性，樁位必須打入木樁或插入竹片作為樁位標記。
下鉆桿時，先使樁機安置在標定的孔位上，使鉆頭中心對準孔中心，桿位偏差在±5cm以內(nèi)，調(diào)整樁機水平度及垂直度，保證孔斜率不大于1.5%，終孔后校正鉆具，樁徑偏差不得大于4
Cards on the table contents:
1. The processing site mixing pile diameter Ф500mm (mixing drill not less than Ф500mm). With 42.5 ordinary portland cement. Strengthening 1m per volume of soil mixed with cement 55kg, unit pile length of the negative deviation of cement content should be controlled within 8%, a negative deviation of single pile of cement consumption should be controlled within 5%.
2. Using two four-jet mixing method construction, top-down mixing, spray mixing bottom-up, water cement ratio of 0.5. Spray mixing head to mention the improvement when the rate of 0.5 ~ 1m/min. Plasma jet should be through the soft soil pile and into the sand or clay layer 0.5 m above, when the soft soil layer more than 18 m, pile length by 18 meters control.
3. Measuring Pile up by design requirements, in determining the hole, the need to be confirmed by the review into the next construction process, in order to ensure the accuracy of the Pile, Pile must be inserted into the stakes or bamboo as the pile bit tag.
Under the drill, the first to pile driver placed in the calibration of the holes, so that the drill center hole aligned center pole position deviation within ± 5cm to adjust the level of degree and verticality of pile driver, to ensure hole is not more than 1.5% slope finally, after correction drill hole, pile diameter deviation of not more than 4